(19)

(11)

EP 1 521 931 A1

(12)

(43) Date of publication: 13.04.2005 Bulletin 2005/15 (21) Application number: 03738827.9 (22) Date of filing: 13.06.2003

(51) International Patent Classification (IPC)7: F16L 55/163 // F16L55:1645 (86) International application number: PCT/SE2003/000994 (87) International publication number: WO 2004/001276 (31.12.2003 Gazette 2004/01)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 20.06.2002 SE 0201889 (71) Applicant: Edström, Sten 804 29 Gävle (SE)	(72) Inventor: Edström, Sten 804 29 Gävle (SE) (74) Representative: Olsson, Jan et al Bjerkéns Patentbyra KBP.O.Box 1274 801 37 Gävle 801 37 Gävle (SE)